2 definitions by Urmomther

Someone in a multiplayer video game who waits for someone to weaken their enemy and kills them last second so instead of the person who did all the work getting credit the the person who stole gets it.
Person 1: WOW, that's so gay!
Person B: What happened?
Person 1: This noob just stole my kill!
Person B: I fuckin hate Kill Stealers!
by Urmomther December 24, 2007
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A Riff is Kill Stealer if you want more click on Kill Stealer
Guy 1: Wow what a kill stealer.
Guy 2: You mean Riff newb.
by Urmomther December 24, 2007
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